Taiss/photoelectric Sensor 30 cm Adjustable M18 Diffuse photoelectric Switch Sensor Optical Three Lines NPN NO (Normally Open) Proximity Switch 6-36VDC E3F-DS30C4

I got a panel tach that came with a magnetic pick up. I made sure to match specs (npn no) same as that one and used this instead. It works brilliantly! Best part is I use it for indoor blower speeds and you don't even have to paint the blower metal black. Just stick on the reflective tape and go! I verified accuracy with a quality tool and it is spot on, only off by .4 rpms when at 180. I have used it up to 1100 rpms and it's able to go much higher. The whole project cost me like $30.00 as I used a transformer I had kicking around and a metal box to put the components and display in, as well as a power cord.

Good construction, lightweight and easy to install. Works well for my application.

Worked better than a more expensive sensor on DIY dust level sensor. I made a level sensor on my Oneida dust deputy that sits on my festool vacuum. This sensor was perfect. I was able to adjust the distance to the 4" I needed with room to adjust closer or farther. My gamble paid off and I purchased 2 more for spare parts just in case.

I am now ordering the 4th one. The first two were defective and I could not even have a chance to return and the return period just passed. The third one was fine until today (12-15-2022) and stopped working all of a sudden. I am now ordering a new one. Seems like they don’t do quality control at all. They sent me two defective sensors.

Like several other recent reviews, I too used this proximity sensor in a DIY project. In my case, to create a low cost dust collector bin monitor. It is well made and works just as described. Only time will tell how long it lasts.

The accuracy was great on lighter colored objects but not so much on darker.

Funciona perfectamente

Cheap and easy. Comparable to devices more than 3x the price